What should be done if the yellow arc on the fuel gauge is indicated?

When the yellow arc on the fuel gauge is indicated, it serves as a warning that the fuel level is low and can potentially impact the safe operation of the aircraft. In the King Air 350, the yellow arc typically signifies that the fuel is nearing the minimum required levels for a safe takeoff and flight.

This visual cue is critical, as flying with insufficient fuel can lead to engine performance issues or even engine failure, both of which present serious safety risks. The best practice in this situation is to refrain from attempting a takeoff because proceeding with marginal fuel could compromise flight safety and violate operational limitations established for the aircraft.

The recommendation to refrain from takeoff aligns with safety protocols that prioritize ensuring adequate fuel supply for uninterrupted flight operations. Therefore, acknowledging the yellow arc on the fuel gauge leads to the conclusion that taking off under such conditions is not advisable, emphasizing the importance of addressing fuel levels before considering flight.